Influence of alkali metal compound on low-temperature NH3-SCR of NO over V2O5/AC catalyst

HAN Bin; LEI Zhigang; LIU Xi; CHEN Biaohua

doi:10.3969/j.issn.0438-1157.2013.08.024

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Influence of alkali metal compound on low-temperature NH₃-SCR of NO over V₂O₅/AC catalyst

更新时间：2025-12-10

- Influence of alkali metal compound on low-temperature NH₃-SCR of NO over V₂O₅/AC catalyst
- CIESC Journal Issue 8, Pages: 2867-2874(2013)
- 作者机构：
  
  北京化工大学化工资源有效利用国家重点实验室,北京,100029
- 作者简介：
- 基金信息：
- DOI：10.3969/j.issn.0438-1157.2013.08.024
  CLC： Q018
- Online First：05 August 2013，
  
  Published：05 August 2013
- 稿件说明：
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HAN Bin, LEI Zhigang, LIU Xi, et al. Influence of alkali metal compound on low-temperature NH₃-SCR of NO over V₂O₅/AC catalyst[J]. CIESC Journal, 2013, (8): 2867-2874. DOI: 10.3969/j.issn.0438-1157.2013.08.024.
DOI：

HAN Bin, LEI Zhigang, LIU Xi, et al. Influence of alkali metal compound on low-temperature NH₃-SCR of NO over V₂O₅/AC catalyst[J]. CIESC Journal, 2013, (8): 2867-2874. DOI: 10.3969/j.issn.0438-1157.2013.08.024. DOI：

摘要

研究了碱金属化合物(K2SO4)对活性炭(AC)担载五氧化二钒(V2O5)组成的V2O5/AC催化剂的低温脱硝活性的影响。发现在V2O5/AC催化剂表面负载碱金属化合物(K2SO4)后其脱硝活性大大降低。用等体积浸渍法制备了V2O5/AC催化剂和Kx-V2/AC(x=0.5

2)催化剂。采用5种模型对动力学实验数据进行关联。结果显示

无论V2O5/AC催化剂是否负载K2SO4

Eley-Rideal模型均比其他模型可更好地描述SCR脱硝反应

碱金属化合物(K2SO4)的存在提高了反应活化能

但并不改变反应机理。

Abstract

The influence of alkali metal compound(K2SO4)on kinetics of low-temperature SCR of NO by NH3 over V2O5(vanadium pentoxide)/AC(activated carbon)catalyst was investigated.The reaction activity decreased obviously when doping the V2O5/AC catalyst with alkali metal compound.The V2O5/AC and Kx-V2/AC(x=0.5

2)catalysts were prepared by the pore volume impregnation method.First

the influence of internal and external diffusions on the intrinsic kinetics experiment was eliminated. Then NH3 SCR experiments with different NO-to-NH3 ratios at various temperatures were carried out to test the model.Both the mechanical(i.e.Eley-Rideal model

Langmuir-Hinshelwood model

and Mars-van Krevelen model)and empirical(i.e.first-order model and power-rate law model)models were used to correlate the experimental data.The results showed that the Eley-Rideal model could well describe the SCR of NO by NH3 over V2O5/AC catalyst than other models whether alkali metal compound was doped in the V2O5/AC catalyst or not.The presence of alkali metal compound increased the reaction activation energy

but not the reaction mechanism.

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